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https://www.readbyqxmd.com/read/29777756/peroxiredoxin-5-regulates-adipogenesis-attenuating-oxidative-stress-in-obese-mouse-models-induced-by-a-high-fat-diet
#1
Mi Hye Kim, Sun-Ji Park, Jung-Hak Kim, Jung Bae Seong, Kyung-Min Kim, Hyun Ae Woo, Dong-Seok Lee
Elevated levels of reactive oxygen species (ROS) are a hallmark of obesity. Peroxiredoxin 5 (Prx5), which is a cysteine-dependent peroxidase enzyme, has an intensive ROS scavenging activity because it is located in the cytosol and mitochondria. Therefore, we focused on the role of Prx5 in regulating mitochondrial ROS and adipogenesis. We demonstrated that Prx5 expression was upregulated during adipogenesis and Prx5 overexpression suppressed adipogenesis by regulating cytosolic and mitochondrial ROS generation...
May 16, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29777633/hypertrophic-effect-of-inhaled-beta-2-agonist-with-and-without-concurrent-exercise-training-a-randomized-controlled-trial
#2
Søren Jessen, Johan Onslev, Anders Lemminger, Vibeke Backer, Jens Bangsbo, Morten Hostrup
INTRODUCTION: Due to a high prevalence of asthma and exercise-induced bronchoconstriction in elite athletes, there is a high use of beta2 -adrenoceptor agonists (beta2 -agonists) in the athletic population. While anabolic in rodents, no study has been able to detect hypertrophy in humans after chronic beta2 -agonist inhalation. METHODS: We investigated if inhaled beta2 -agonist, terbutaline, alters body composition and metabolic rate with and without concurrent exercise training in healthy young men...
May 19, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29777386/substrate-metabolism-during-ironman-triathlon-different-horses-on-the-same-courses
#3
Ed Maunder, Andrew E Kilding, Daniel J Plews
Ironman triathlons are ultra-endurance events of extreme duration. The performance level of those competing varies dramatically, with elite competitors finishing in ~ 8:00:00, and lower performing amateurs finishing in ~ 14-15:00:00. When applying appropriate values for swimming, cycling and running economies to these performance times, it is demonstrated that the absolute energy cost of these events is high, and the rate of energy expenditure increases in proportion with the athlete's competitive level...
May 18, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29776966/loss-of-tigar-induces-oxidative-stress-and-meiotic-defects-in-oocytes-from-obese-mice
#4
Haichao Wang, Qing Cheng, Xiaoyan Li, Feifei Hu, Longsen Han, Hao Zhang, Ling Li, Juan Ge, Xiaoyan Ying, Xuejiang Guo, Qiang Wang
Maternal obesity has been reported to impair oocyte quality in mice, however, the underlying mechanisms remain unclear. In the present study, by conducting a comparative proteomic analysis, we identified a reduced expression of TIGAR protein in ovulated oocytes from high-fat diet (HFD)-fed mice. Specific depletion of TIGAR in mouse oocytes results in the marked elevation of reactive oxygen species (ROS) levels and the failure of meiotic apparatus assembly. Importantly, forced expression of TIGAR in HFD oocytes not only attenuates ROS production, but also partly prevents spindle disorganization and chromosome misalignment during meiosis...
May 18, 2018: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29775890/triterpenic-acids-enriched-fraction-from-cyclocarya-paliurus-attenuates-non-alcoholic-fatty-liver-disease-via-improving-oxidative-stress-and-mitochondrial-dysfunction
#5
Meng-Ge Zhao, Xue-Ping Sheng, Ya-Ping Huang, Yi-Ting Wang, Cui-Hua Jiang, Jian Zhang, Zhi-Qi Yin
The effects of triterpenic acids-enriched fraction from Cyclocarya paliurus (CPT) on nonalcoholic fatty liver disease (NAFLD) were investigated using in vivo and in vitro models. In high fat diet-induced Wister rats, CPT significantly increased superoxide dismutase (SOD) activity and glutathione/oxidized glutathione (GSH/GSSG) ratio, reduced malondialdehyde (MDA) and protein carbonyl (PCO) levels. Moreover, CPT restored mitochondrial membrane potential dysfunction, decreased cytochrome P450 enzyme 2E1 (CYP2E1) activity, improved nuclear factor erythroid 2-related factor 2 (Nrf2) and Nrf2-mediated antioxidant enzyme heme oxygenase1 (HO-1) expression...
May 15, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29775616/amelioration-of-uvb-induced-oxidative-stress-and-inflammation-in-fat-1-transgenic-mouse-skin
#6
Hye-Won Yum, Seong Hoon Kim, Jing X Kang, Young-Joon Surh
ω-3 polyunsaturated fatty acids (PUFAs), which are abundant in some fish oils, are known to scavenge lipid peroxyl radicals and increase host immunoresponsiveness. As UVB-induced oxidative stress and inflammation have been implicated in apoptotic cell death, this study was designed to investigate the anti-inflammatory, anti-oxidative, and anti-apoptotic capacity of fat-1 transgenic mice capable of converting ω-6 to ω-3 PUFAs. Wild-type (WT) C57BL/6 mice and fat-1 mice were maintained on the AIN-93 diet supplemented with 10% safflower oil rich in ω-6 PUFAs for 5 weeks...
May 15, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29773865/perlecan-a-heparan-sulfate-proteoglycan-regulates-systemic-metabolism-with-dynamic-changes-in-adipose-tissue-and-skeletal-muscle
#7
Yuri Yamashita, Satoshi Nakada, Toshinori Yoshihara, Takeshi Nara, Norihiko Furuya, Takashi Miida, Nobutaka Hattori, Eri Arikawa-Hirasawa
Perlecan (HSPG2), a heparan sulfate proteoglycan, is a component of basement membranes and participates in a variety of biological activities. Here, we show physiological roles of perlecan in both obesity and the onset of metabolic syndrome. The perinatal lethality-rescued perlecan knockout (Hspg2-/- -Tg) mice showed a smaller mass and cell size of white adipose tissues than control (WT-Tg) mice. Abnormal lipid deposition, such as fatty liver, was not detected in the Hspg2-/- -Tg mice, and those mice also consumed more fat as an energy source, likely due to their activated fatty acid oxidation...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29772784/capsaicin-in-metabolic-syndrome
#8
REVIEW
Sunil K Panchal, Edward Bliss, Lindsay Brown
Capsaicin, the major active constituent of chilli, is an agonist on transient receptor potential vanilloid channel 1 (TRPV1). TRPV1 is present on many metabolically active tissues, making it a potentially relevant target for metabolic interventions. Insulin resistance and obesity, being the major components of metabolic syndrome, increase the risk for the development of cardiovascular disease, type 2 diabetes, and non-alcoholic fatty liver disease. In vitro and pre-clinical studies have established the effectiveness of low-dose dietary capsaicin in attenuating metabolic disorders...
May 17, 2018: Nutrients
https://www.readbyqxmd.com/read/29772667/evaluation-of-energy-expenditure-and-oxidation-of-energy-substrates-in-adult-males-after-intake-of-meals-with-varying-fat-and-carbohydrate-content
#9
Edyta Adamska-Patruno, Lucyna Ostrowska, Anna Golonko, Barbara Pietraszewska, Joanna Goscik, Adam Kretowski, Maria Gorska
Obesity is a result of positive energy balance. The aim of this study was to measure (in crossover trials) the energy expenditure and oxidation of glucose and lipids, both at the fasting state and after an intake of meals with a varying macronutrient content, in normal-weight and overweight/obese people. In the study, 46 healthy adult males (23 with normal body weight and 23 overweight/obese), aged 21⁻58, were examined. During two consecutive visits, subjects received isocaloric standardized meals (450 kcal) with different content of basic nutrients...
May 16, 2018: Nutrients
https://www.readbyqxmd.com/read/29770778/apolipoprotein-e-in-diet-induced-obesity-a-paradigm-shift-from-conventional-perception
#10
Kyriakos E Kypreos, Eleni A Karavia, Caterina Constantinou, Aikaterini Hatziri, Christina Kalogeropoulou, Eva Xepapadaki, Evangelia Zvintzou
Apolipoprotein E (APOE) is a major protein component of peripheral and brain lipoprotein transport systems. APOE in peripheral circulation does not cross blood brain barrier or blood cerebrospinal fluid barrier. As a result, peripheral APOE expression does not affect brain APOE levels and vice versa. Numerous epidemiological studies suggest a key role of peripherally expressed APOE in the development and progression of coronary heart disease while brain APOE has been associated with dementia and Alzheimer's disease...
November 1, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/29769827/effects-of-a-4-week-very-low-carbohydrate-diet-on-high-intensity-interval-training-responses
#11
Lukas Cipryan, Daniel J Plews, Alessandro Ferretti, Phil B Maffetone, Paul B Laursen
The purpose of the study was to examine the effects of altering from habitual mixed Western-based (HD) to a very low-carbohydrate high-fat (VLCHF) diet over a 4-week timecourse on performance and physiological responses during high-intensity interval training (HIIT). Eighteen moderately trained males (age 23.8 ± 2.1 years) consuming their HD (48 ± 13% carbohydrate, 17 ± 3% protein, 35 ± 9% fat) were assigned to 2 groups. One group was asked to remain on their HD, while the other was asked to switch to a non-standardized VLCHF diet (8 ± 3% carbohydrate, 29 ± 15% protein, 63 ± 13% fat) for 4 weeks...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29769123/obesity-impairs-male-fertility-through-long-term-effects-on-spermatogenesis
#12
Yan-Fei Jia, Qian Feng, Zheng-Yan Ge, Ying Guo, Fang Zhou, Kai-Shu Zhang, Xiao-Wei Wang, Wen-Hong Lu, Xiao-Wei Liang, Yi-Qun Gu
OBJECTIVE: This study aimed to investigate the effect and possible underlying mechanisms of high-fat diet-induced obesity on spermatogenesis in male rats. METHODS: A total of 45 male rats were randomly divided into control (n = 15, normal diet) and obesity groups (n = 30, high-fat diet) and were fed for 16 weeks. Body weight and organ indexes were determined after sacrifice. Indicators of reproductive function, including sperm count, sperm motility, apoptosis of spermatogenic cells, and oxidative stress levels, were measured...
May 16, 2018: BMC Urology
https://www.readbyqxmd.com/read/29767680/propensity-for-adverse-pregnancy-outcomes-in-african-american-women-may-be-explained-by-low-energy-expenditure-in-early-pregnancy
#13
Jasper Most, L Anne Gilmore, Abby D Altazan, Marshall St Amant, Robbie A Beyl, Eric Ravussin, Leanne M Redman
Background: African-American (AA) women have poorer pregnancy outcomes and studies in nonpregnant women suggest a different etiology of weight gain in AA compared with white women. We hypothesized that physiologic factors such as low energy expenditure and physical activity would be present in AA compared with white women in pregnancy. Objective: We aimed to identify physiologic risk factors for disordered energy balance in AA and white women early in pregnancy...
May 14, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29766801/naringenin-and-its-nano-formulations-for-fatty-liver-cellular-modes-of-action-and-clinical-perspective
#14
Mahdi Zobeiri, Tarun Belwal, Fatemeh Parvizi, Rozita Naseri, Mohammad Hosein Farzaei, Seyed Fazel Nabavi, Antoni Sureda, Seyed Mohammad Nabavi
BACKGROUND: Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease mainly caused by high fat diets and sudden feed changes, vitamin and energy deficiency, and inflammatory processes. Fatty liver leads to cirrhosis, hepatocellular carcinoma as well as liver failure. Lifestyle-modifying such as weight loss and healthy diet have an inverse correlation with the risk of fatty liver. The promising effect of a diet rich in vegetables and fruits against fatty liver has been evidenced by several empirical studies focused on flavonoids...
May 14, 2018: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/29766601/functional-high-intensity-exercise-training-ameliorates-insulin-resistance-and-cardiometabolic-risk-factors-in-type-2-diabetes
#15
Ciarán E Fealy, Stephan Nieuwoudt, Julie A Foucher, Amanda R Scelsi, Steve K Malin, Mangesh Pagadala, Lauren A Cruz, Miranda Li, Michael Rocco, Bartolome Burguera, John P Kirwan
AIM: Functional high intensity training (F-HIT) is a novel fitness paradigm that integrates simultaneous aerobic and resistance training in sets of constantly varied movements, based on real-world situational exercises, performed at high intensity in workouts that range from ∼8-20 min/session. We hypothesized that F-HIT would be an effective exercise mode for reducing insulin resistance in type 2 diabetes (T2D). METHODS: We recruited 13 overweight/obese adults (5 males, 8 females; 53 ± 7 years; BMI 34...
May 15, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29765980/aerobic-interval-training-regulated-sirt3-attenuates-high-fat-diet-associated-cognitive-dysfunction
#16
Zhaoling Shi, Chen Li, Yue Yin, Zheng Yang, Han Xue, Nan Mu, Yishi Wang, Manling Liu, Heng Ma
Cognitive dysfunction is an important complicated disease in obesity. Exercise ameliorates obesity and the related cognitive dysfunction. However, the underlying mechanism is still unclear. In this study, we investigated whether aerobic interval training (AIT) could attenuate high-fat-diet- (HFD-) associated cognitive dysfunction and the possible mechanism of SIRT3-MnSOD pathway. C57BL/6 wild-type (WT) mice and SIRT3 knockout (KO) mice were randomized into control (Con) or HFD group with or without AIT training for 6 weeks...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29765489/gallic-acid-l-leucine-conjugate-protects-mice-against-lps-induced-inflammation-and-sepsis-via-correcting-proinflammatory-lipid-mediator-profiles-and-oxidative-stress
#17
Yuanyuan Cheng, Xuechen Li, Hung-Fat Tse, Jianhui Rong
The pathology of endotoxin LPS-induced sepsis is hallmarked by aberrant production of proinflammatory lipid mediators and nitric oxide (NO). The aim of the present study was to determine whether the new product gallic acid-L-leucine (GAL) conjugate could ameliorate the LPS-induced dysregulation of arachidonic acid metabolism and NO production. We first investigated the effects of GAL conjugate on the expression of proinflammatory enzymes and the production of proinflammatory NO and lipid mediators in mouse macrophage cell line RAW264...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29765452/effects-and-potential-mechanism-of-atorvastatin-treatment-on-lp-pla2-in-rats-with-dyslipidemia
#18
Dongdan Zheng, Anping Cai, Rulin Xu, Zhuocheng Mai, Yingling Zhou, Fanfang Zeng, Liwen Li, Weiyi Mai
Introduction: The effects of statins on lipoprotein-associated phospholipase A2 (Lp-PLA2) are controversial, and the present study aimed to investigate whether atorvastatin could reduce Lp-PLA2 in rats with dyslipidemia. Material and methods: A high-fat and high-cholesterol diet was prescribed to produce a dyslipidemia model. Thereafter, low-dose atorvastatin (5 mg/kg/day), high-dose atorvastatin (20 mg/kg/day) or saline (without-treatment group) was prescribed for 14 days...
April 2018: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/29764990/ire1%C3%AE-prevents-hepatic-steatosis-by-processing-and-promoting-the-degradation-of-select-micrornas
#19
Jie-Mei Wang, Yining Qiu, Zhao Yang, Hyunbae Kim, Qingwen Qian, Qinghua Sun, Chunbin Zhang, Lei Yin, Deyu Fang, Sung Hong Back, Randal J Kaufman, Ling Yang, Kezhong Zhang
Obesity or a high-fat diet represses the endoribonuclease activity of inositol-requiring enzyme 1α (IRE1α), a transducer of the unfolded protein response (UPR) in cells under endoplasmic reticulum (ER) stress. An impaired UPR is associated with hepatic steatosis and nonalcoholic fatty liver disease (NAFLD), which is caused by lipid accumulation in the liver. We found that IRE1α was critical to maintaining lipid homeostasis in the liver by repressing the biogenesis of microRNAs (miRNAs) that regulate lipid mobilization...
May 15, 2018: Science Signaling
https://www.readbyqxmd.com/read/29764315/effects-of-egg-consumption-and-choline-supplementation-on-plasma-choline-and-trimethylamine-n-oxide-in-a-young-population
#20
Bruno S Lemos, Isabel Medina-Vera, Olga V Malysheva, Marie A Caudill, Maria Luz Fernandez
BACKGROUND: Plasma trimethylamine-N-oxide (TMAO) concentrations have been associated with cardiovascular disease risk. Eggs are a rich source of choline, which is a precursor of TMAO. OBJECTIVE: The effects of egg intake versus daily choline supplementation were evaluated on plasma choline and TMAO in a young, healthy population. METHODS: Thirty participants (14 males, 16 females; 25.6 ± 2.3 years; body mass index = 24.3 ± 2.9 kg/m2 ) were enrolled in this 13-week crossover intervention...
May 15, 2018: Journal of the American College of Nutrition
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